Performance Evaluation of Multiple-Cell DS-CDMA Systems Over Correlated Nakagami-m Fading Environments

Authors:
Joy Iong-Zong Chen
Affiliations:
Department of Communication Engineering, Da Yeh University, Chang-Hua, R.O.C. 51505
Venue:
Wireless Personal Communications: An International Journal
Year:
2005

Citing 3
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Abstract

In this paper, the impact of the branch correlation on the performance of multiple-cell DS-CDMA cellular systems over Nakagami-m fading channels with arbitrary branch correlation is investigated. The received multipath-faded signals are assumed to experience identical but non-independent correlated Nakagami-m channels within the reference cell. A new closed-form formula for the joint probability density function (joint pdf) of the diversity combiner with arbitrary correlation coefficients in terms of the generalized Laguerre polynomial and the new expressions of average bit-error rate (BER) for the DS-CDMA system are given in this paper. The results, which were also compared with the performance of the single cell environments, demonstrate that the BER is significantly dependent on the correlation characteristic of diversity branching for both single-cell and multiple-cell environments.